package cn.wolfcode.qo;

import lombok.Getter;

import java.util.List;

/**
 * @author L5775
 */
@Getter
public class PageResult<T> {

    //页面传过来
    private int currentPage;
    private int pageSize;

    //从数据库查询出来
    private int totalCount;
    private List<T> data;

    //计算出来
    private int totalPage;
    private int prevPage;
    private int nextPage;

    public PageResult(int currentPage, int pageSize, int totalCount, List<T> data) {
        this.currentPage = currentPage;
        this.pageSize = pageSize;
        this.totalCount = totalCount;
        this.data = data;

        if (this.totalCount <= this.pageSize) {
            this.totalPage = 1;
            this.nextPage = 1;
            this.prevPage = 1;
            return;
        }

        this.totalPage = this.totalCount % this.pageSize == 0 ? this.totalCount / this.pageSize
                : this.totalCount / this.pageSize + 1;
        this.prevPage = this.currentPage - 1 >= 1 ? this.currentPage - 1 : 1;
        this.nextPage = this.currentPage + 1 <= this.totalPage ? this.currentPage + 1 : this.totalPage;
    }
}
